Merge pull request #985 from ember-cli/fix-static-this

Fix static-this type error

Author: ef4

addon/index.d.ts

@@ -1,9 +1,11 @@
 import { Resolver as ResolverContract } from "@ember/owner";
 
 export default class Resolver {
-  static create(props: Record<string, unknown>): InstanceType<this>;
-  static withModules(modules: Record<string, unknown>): this;
+  static create<T extends typeof Resolver>(this: T, props: Record<string, unknown>): InstanceType<T>;
+  static withModules<T extends typeof Resolver>(this: T, modules: Record<string, unknown>): T;
 }
 export default interface Resolver extends Required<ResolverContract> {
     pluralizedTypes: Record<string, string>;
 }
+
+